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INSTALLATIONS
MB899 User’s Manual
17
J3: System Function Connector
J3 provides connectors for system indicators that provide light indication
of the computer activities and switches to change the computer status. J3
is a 20-pin header that provides interfaces for the following functions.
Hard Disk Drive LED
Reset
Switch
Not Defined
ATX Power On Switch
Not Defined
Power LED
Speaker
Speaker: Pins 1 - 4
This connector provides an interface to a speaker for audio
tone generation. An 8-ohm speaker is recommended.
Pin #
Signal Name
1 Speaker
out
2 No
connect
3 Ground
4 +5V
Power LED: Pins 11 - 15
Pin #
Signal Name
11 Power
LED
12 No
connect
13 Ground
14 No
connect
15 Ground
ATX Power ON Switch: Pins 7 and 17
This 2-pin connector is an “ATX Power Supply On/Off
Switch” on the system that connects to the power switch on
the case. When pressed, the power switch will force the
system to power on. When pressed again, it will force the
system to power off.
Summary of Contents for MB899
Page 1: ...MB899 Intel CoreTM 2 Duo CoreTM Duo Solo 945GM Mini ITX Motherboard USER S MANUAL Version 1 0A...
Page 8: ...INTRODUCTION 4 MB899 User s Manual Board Dimensions...
Page 16: ...INSTALLATIONS 12 MB899 User s Manual Connector Locations on MB899...
Page 30: ...INSTALLATIONS 26 MB899 User s Manual This page is intentionally left blank...
Page 54: ...BIOS SETUP 50 MB899 User s Manual This page is intentionally left blank...